Nokia X3 -02 Volume Control and Lock Button Switch Jumper Ways Solution Here is the Nokia X3 -02 Volume + (Up) and Volume - (down ) button and lock side buttons connecting tracks . This can help to jump if wire needs if button switches did not work or have such a problem : the soldering points for connecting switches are damaged connection in bending switches is already cut . 
Just refer to the solution below and watch carefully each button switches connection. Right on the left side of the flexible card, you can see the open places where you can apply the solder to the rider. This can help if the connection to the flexible ribbon button switches is already cut or damaged. Now, if it appears that the cable is correct and that the lock button volume control switch and check or replace , but does not always work . , The problem can also be found on the keyboard filter IC, replacing it does not solve the problem .. See here the problem Nokia X3 -02 and keypad filter IC solution , which also contribute to the volume up / down key and lock problem.
Just refer to the solution below and watch carefully each button switches connection. Right on the left side of the flexible card, you can see the open places where you can apply the solder to the rider. This can help if the connection to the flexible ribbon button switches is already cut or damaged. Now, if it appears that the cable is correct and that the lock button volume control switch and check or replace , but does not always work . , The problem can also be found on the keyboard filter IC, replacing it does not solve the problem .. See here the problem Nokia X3 -02 and keypad filter IC solution , which also contribute to the volume up / down key and lock problem.
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